Science

Unseasonably high temperatures are expected across the western U.S. this week, with an excessive heat warning forecast for Wednesday through Friday in Arizona cities including Phoenix.

Researchers tracking pregnant porbeagle sharks uncovered the first evidence of the species getting eaten by something even bigger.

Hail has caused higher damage costs in the U.S. this year than hurricanes and floods put together. Research suggests climate change will make hailstones larger.

Agave and saguaro cacti, both heat-tolerant and drought-resistant, are suffering as climate change makes heat waves more frequent and intense.

An NIH-sponsored study is developing wearable biosensors that measure workers' vital signs and activity levels. Eventually, the system could alert people if they're in danger due to heat.

Last week, NASA said its two astronauts who flew to the space station in the Starliner will return to Earth in a SpaceX vehicle early next year.

Four people have received hearts or kidneys from pigs. Some of their relatives recount a roller coaster of hope and uncertainty.

After more than three years exploring the floor of the crater it landed in, Perseverance has begun a monthslong trek to the rim at the top.

The largest dam removal project in U.S. history is nearing completion.

A new study highlights the worrisome possibility that Canada’s forests might not serve as reliable long-term sinks for carbon.

The delay this time was because of an unfavorable weather forecast off the Florida coast, where the crew would splash down at the end of the mission.